Improvement in rendering paper and other facrics incorrodible



UNITE STATES PATENT OFFICE.

IMPROVEMENT IN RENDERING PAPER AND OTHER FACRICS INCORRODIBLE.

Specification forming part of Letters Patent No. 22,015, dated November 9, 1858.

To all whom it may concern:

Be it known that I, THOMAs G. OHAsE, M. D., of the city and county of Philadelphia, State of Pennsylvania, have invented a new and improved method of preventing the corrosive action of caustic alkali uponpaper and other fibrous and textile fabrics; and I do hereby declare the following is a full and accurate description thereof.

The nature of my invention consists in the application of paraffine and naphtha to paper and other similar fabrics, by which it is rendered proof against the corrosive action of caustic alkali.

To enable others to makeand use my invention, I will proceed to describe its composition and application.

I take paraffine combined with one-tenth part naphtha, or such other proportions as I may find necessary, (using a larger proportion of naphtha if it is intended for a cold climate, and a less proportion or its omission if for a hot climate,) and having melted the same by a gentle heat I dip paper or other suitable fabric into the melted mass, and when cool wrap up cakes of alkali with the prepared paper. I then seal up and varnish the wrapper I externally, and put the whole into one or more envelopes. r 1

I am aware that other compositions of matter have been used to protect caustic alkali from the action of air and moisturesuch as I claim and desire to secure by Letters Patent The application of paraffine either alone or in combination with naphtha for the purposes described, as set forth, so as to secure paper and other fabrics from the corrosive action of caustic alkali, in order that it may be put up securely in small parcels.

THOMAS G. CHASE.

Witnesses WILLIAMS OGLE, FRANKLIN STEWART. 

